dianion

例句：

1. 1. The electrons in the cloud are moving at different speeds.
   云中的电子以不同的速度移动。
2. 2. The ionization process is crucial for the formation of new compounds.
   离子化过程对于形成新化合物至关重要。
3. 3. The electron beam was used to ionize the gas molecules.
   电子束被用来离子化气体分子。